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Finding the Fourth Proportional to 359,785.82, 539,580.18 and 135,128.88

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Solution

The fourth proportional to 359,785.82, 539,580.18 and 135,128.88 is: 202,656.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,785.82 : 539,580.18 = 135,128.88 : x
  2. Step 2: Convert to fraction form
    359,785.82/539,580.18 = 135,128.88/x
  3. Step 3: Cross multiply
    359,785.82x = 539,580.18 × 135,128.88
  4. Step 4: Simplify right side
    359,785.82x = 72,912,865,393.60
  5. Step 5: Solve for x
    x = 72,912,865,393.60/359,785.82
  6. Step 6: Final answer
    x = 202,656.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.